If you’ve been hunting for a premium vacuum tube integrated amplifier, the Octave V80SE should be at the top of your list. All previous Octave amplifiers we’ve used are built like a mid-80s S-Class Mercedes, i.e. to last forever, and have a slick, stark aesthetic that’s at home anywhere. Available in matte black or silver, the V80SE has an MSRP of $13,500. You can add the Black Box ($1,500) or the Super Black Box ($3,500) for even more performance.
This amplifier delivers 120 watts per channel into 4-ohms, and while it’s been here, we found it able to drive every speaker at our disposal with ease, from traditionally power hungry Magnepans to the extremely efficient Zu and Heretic speakers.
Taking advantage of a quartet of KT150 tubes to deliver the music, Octave amplifiers (including our reference V110SE/Super Black Box) are manually biased and offer long tube life as well. There is a complex protection system built in, should there ever be a tube failure, so there’s no chance of speaker damage in the unlikely event of a tube failure.
While not sterile like some of today’s current tube designs trying to sound like solid-state amplifiers, the V80SE is not overly warm sounding either. It has the tonal saturation and airiness that you go to tubes for, yet has tremendous bass extension and grip.
A mixture of single-ended and balanced inputs make it easy to incorporate into your system, and straightforward controls, along with an awesome remote control (only volume up and down) make it a great listening partner.
The Black Box and Super Black boxes offer more power supply capacitance and connect via umbilical cord to the back of the amplifier, giving it more dynamic ability, and more control over lower impedance speakers. We’ve got an extensive review out shortly, but for all but those having the most expensive tastes, you can build an incredible system around this integrated.
The V110SE is a staff favorite (and a reference component) and the V80SE takes every aspect of the V110SE to an even higher level of performance. (photos courtesy of Octave.de)
The Audiophile Apartment: Jerold O’Brien’s final review, a new power strip from ISOTEK!
Journeyman Audiophile: Back next issue
Headphone Arts: The Spectacular Top Phones from Meze!
Mine: It Should Be Yours
Future Tense: Gear in our immediate future
Reviews
Killer Analog from Luxman: The PD-191A You can’t resist the Borg Episode 2 from FinkTeam MonAcoustics stunning Platimon Monitors Great power cords for entry level gear from Wireworld
We just received a pair of the latest Ultra Evolution Towers from SVS, which is the smallest of three new floorstanding speakers that reflect their latest design upgrades: Time aligned drivers, diamond coated tweeters, and much more!
It’s hard to believe that a $2,000 amplifier drives the $149k pair of Clarisis Auditorium Plus ribbon speakers with this level of control, quality, and tonal involvement.
Chris has me listening to Tool’s Fear Inoculum album more, and the track “Chocolate Chip Trip” has become a great test track due to its percussive, massive soundstage. Moving the A40 over to the Peak Consult Sinfonias ($68k/pair) proves equally involving. Even the new Magnepan 2.7X speakers ($10k/pair) deliver a lovely presentation with this small but weighty amplifier.
A 40-watt per channel amplifier can’t be everything for everyone, but the high level of sonic and aesthetic quality delivered here for $1,995 is incredibly impressive. Those familiar with Class A solid-state amplifiers know they generate a fair amount of heat and have a somewhat tube-like sonic characteristic, delivering a proportionately high degree of “that sound” without the inconvenience of selecting and replacing tubes.
The delicacy offered by smaller, simpler circuits is equally intriguing and tough to duplicate in higher-powered versions. We’ve had this experience with low-powered Class A amplifiers from Pass and Luxman. When talking to Nelson Pass about the XA25 and the XA30.8 power amplifiers we’ve recently reviewed (as well as their INT-25 amplifier), he makes it a point to say that the magic is tricky to scale.
It’s necessary to point out that the Alpha Nirvana amplifier making up the core technology of the A40 is a building block for Vera-Fi and their team, headed by Dr. Viet Nguyen (Lead Engineer), Jean-Paul Sweitzer, Darko Marinkovic, and Anthony Tuttle. But this is not the amplifier kit you can buy online for about 600 bucks; it’s much more. For those not familiar, Hugh Dean is the designer of the Audio Nirvana, so this is truly a global team project!
While we’re on that subject, the level of visual and aesthetic refinement that the Vera-Fi model brings is ace. This 50-pound amplifier is stunning in person, with fine detail in the machining and finishing, along with some integrated handles that are functional and attractive.
Much as I’d tell you to build one of these to get your hands dirty (I’ve got a Pass clone that I really need to get built one of these days, just because), DIY stuff usually looks somewhere between dreadful and scary when complete. This is an amplifier I’d be proud to have on the same rack as my Nagra tube preamp.
Vera-fi has made all the right choices in the A40s construction. Rather than trying to be everything to everyone and using substandard input transformers to offer a balanced input, Vera-Fi employs a single set of RCA input jacks and a single pair of Viborg copper 5-way binding posts for output. The inside reveals top shelf caps, careful wiring, and a pair of sizeable toroidal power transformers. You’ll either love or hate the yellow, backlit VU output meters, but I’m a fan. Those meters are the only aesthetic frivolity present.
Setup
As with any Class-A amplifier, the A40 runs very warm once on for about an hour. It offers good sound out of the box, but everything stabilizes somewhere between 50 and 100 hours. Because of the increased power draw of the Class A circuitry, you probably won’t want to leave everything on 24/7. Complete warm-up occurs around 45 minutes, and the amplifier sounds a little foggy right after powering up, but it goes away.
While the A40 was placed front and center, being fed by the Pass Labs XSPre line stage, dCS Vivaldi ONE Dac/streamer/player, and driving some pretty major speakers, this shows precisely how much resolution it has compared to other amplifiers at similar and substantially higher price points.
You aren’t getting a pair of $90/K Pass monoblocks for $2k, but you are getting an incredible amount of sonic goodness for the price. In terms of sheer musicality, this robust little amplifier delivers nuance and detail that many far more expensive solid-state amplifiers can’t. But remember, 40wpc. So choose your speakers wisely.
The overall sound
Fans of Class-A designs will feel at home with the A40. The soundscape is expansive, the highs liquid and non-electronic sounding (i.e. lack of grain, edginess, and fatigue), with a midrange musicality better than many (more expensive) non class – A solid state amplifiers.
As with all great Class-A solid state amplifiers, those of you who love music featuring solo vocals, and heavy on the acoustic instruments will have a lot to explore. However, if you have speakers with enough sensitivity (like the ZU DWRs in for review right now) you should be able to really raise the roof. I’ve gotten in line to purchase an A40 because I’m always looking for great building blocks to assemble systems at all levels, and I suspect this amplifier will provide brain-damage volume levels when I get my hands on those vintage Klipschorns calling out to me across the I-5 bridge at Echo Audio.
With all speakers used for the demo, the bass is extended and controlled. Better than tubes but not quite as much as a higher-powered Class-AB amplifier. This holds true for every other brand of solid-state amplifier I’ve used, so no disrespect to the A40. Even when using the MartinLogans with a pair of passive woofers, all my favorite bass-heavy tracks deliver the goods.
Best of all, this amplifier is free of fatigue. Even when playing it 24 hours a day for the first week with the Peak Consult speakers, this is an amplifier you can listen to forever without it getting on your nerves. I know this is what has always drawn me to Class-A solid-state designs. The overall sound is slightly warm, not as warm as a Pass labs amplifier, and much less warm/lush than a Luxman or Accuphase class A design. In addition to the dynamic drive this amplifier offers, clearly evident on your favorite heavy rock tracks, the A40 brings so much inner detail and depth to your favorite tracks that you’ll be wondering how you did without it.
It may be old age and fondness taking advantage of me, but the A40 channels my old Mark Levinson ML-2 amplifiers in the way it presents music. After my A40 arrives (get your order in now, there are only a few left of the first batch, and they are taking $500 pre-orders for the next production run) I’ll find a pair of ML-2s to get in for comparison?
Appropriately paired
Keeping the A40 in context with the gear I’d probably pair it up with if I were building a system for about 10-15k is a home run. An out-of-the-ballpark, across the fence, into the parking lot home run. Using an older ARC SP-9 preamplifier (about $900 – used), the Naim CD5is CD player (about $2k new), a used SOTA Sapphire turntable (again about $1,500) along with the Harbeth Monitor 30 speakers, Magnepan 2.7X speakers, and the Vera-Fi Vanguards. Altogether, these Legos were combined to build systems worth about $6,000 to about $20k.
It’s also worth mentioning that the A40 does an excellent job driving the MartinLogan ESL9s we have on hand. If you have a pair of MLs around, this can be your amplifier, too, if you don’t need to blow the windows out. Great success was had with my vintage Acoustat 2+2 ESL speakers, so this might just be a FAB amplifier to pair up with a pair of Quad 57s too. Finally, the A40 perfectly matches the new SVS Ultra Evolution Towers. We’ve got a pair of those in on review, too, and their highly resolving diamond tweeter might be a bit too much for some, but the combination of the modestly mellow A40 and the up-front SVS speakers is a killer combo.
In conclusion, the A40 is an excellent anchor for a sub-$20k hifi system without having to go used or DIY. While you can’t bridge them (again, there goes the magic), using a pair of these in a vertical biamp type system could be incredibly good for those craving more dynamic headroom.
The A40 delivers so much performance for the money the only reasonable comparison I could come up with was the PrimaLuna EVO 100. At about $2,600, this 38 wpc tube amp is equally robust but very different. Of course, the tube amp has even more tonal saturation, especially the midrange – but the tubes don’t control the bottom end as succinctly as the A40 does. Highs are different in presentation, with the A40 being more resolving and the EVO 100 being more silky smooth.
These two power amplifiers represent the best values going in a low powered tube or solid-state amplifier period, end of story. Some of you will have to have tubes, while others will insist on solid-state. If you’re on the fence, I suggest the A40 because you’ll never have to replace tubes.
Wait for it
Sometime next year, Vera-Fi will produce a matching preamplifier to go with the A40, and if you like all your components to have similar form factors, I suspect this will be a nice addition.
Affordable, high-performance solid-state has a new advocate. Not to be missed. Please click here to go directly to the A40 on the Vera Fi site. All the pertinent specs are here too.
Whether you are listening to two, or multiple channels, chances are your system will benefit from additional low frequency output. Adding a subwoofer is a deceptively simple thing that doesn’t always deliver the desired results, regardless of the price asked.
The Vera-Fi Scout speakers ($299pair) we recently reviewed HERE, are typical in the sense that they need more bass, but atypical in the level of quality delivered for their $299 price. The new Caldera Subwoofer reviewed here is a perfect match for the Scouts, and works well with a wide range of other small-ish speakers too. The value proposition at $199 is off the chart good.
We have a full review in process, using the 10” Caldera with a number of small speakers, as well as the small Magnepan .7s. A number of internet pundits suggest these work well with Magnepan speakers, so we reserve judgement until our used pair of .7s arrive from The Music Room.
Thanks to the small form factor, the Caldera works equally well under a desk and out in a room. Using the test sample, in the corner of an 11 x 13 foot room, it provides a rock solid base to the Scouts, that can’t be beat.
The line level (RCA) inputs are great in a desktop system, or to keep a speaker with very little low frequency output from bottoming it’s woofer cone. A vintage pair of ADS 300s worked best in this configuration. Being a REL guy, I prefer to run the main speakers full range and take advantage of the high level speaker inputs – which delivers a more open presentation. But hey, this is a hobby, right? Try the configuration that delivers the best results in your system. (PS: we will have in-depth setup tips in the full review – start with it in the corner for now and adjust to best integration)
With 200 watts on tap, and a variable crossover that can be set from 20-200 Hz, you should be able to integrate the Caldera with anything. Cruising through a playlist of bass-heavy tracks, comprising some hip-hop, prog, and classic rock, all deliver excellent results. If you can resist the urge to turn the volume control up too far, you’ll be mighty impressed with how much this little sub can truly offer in terms of total system musicality.
Fortunately, the Caldera is light enough to allow easy movement in your room to achieve sonic results that will deliver the most bass output and the most seamless integration with your main speakers.
Of course, the big news is that now you can get Pass components in black. This is a good thing considering how many people have passed on conrad-johnson gear over the years because the champagne color does not match anything else in their system.
The more significant news is how great these amplifiers sound. though these are Pass Labs’ smallest monoblock amplifiers, they still weigh about 90 pounds per chassis. If you aren’t familiar, each Pass amplifier always has its own unique sonic character, and the XA60.8s is no different – with the pair having much of the lush, texture-laden presentation of the XA25, combined with the LF grip and control, offered by the larger Class-A monoblocks.
Incidentally, this is what the “A” designation means. The XA60 monos are claimed to deliver 60 watts per channel into an 8-ohm load in full class-A
conditions. Other magazines that produce measurements confirm this to be true, revealing these amplifiers can produce over double this amount of power before distortion sets in.
The catch? They gently switch their bias current to class-AB operation. The big, blue circular meter on the front panel stays in the middle of its range while the amplifier stays in class-A mode, bouncing to the right as it exits into class-AB.
When driving MartinLogan ESP 9s, the Team Fink Borg (episode 2), and the Clarisys Audio Auditorium Plus speakers, the meters never left the center position. Only when driving the new power-hungry Magnepan 2.7X speakers were we able to push the XA60.8s into class-AB mode.
In short, the definition throughout the frequency range is incredible, with an equally sublime rendition of higher frequencies to match. Pass Labs’ class-A amplifiers all have a mid-band rendition that nearly fools you into thinking you’re listening to tubes, and these amplifiers even a bit more. The level of detail, layering, and ability to create a three-dimensional sound field is incredible – the lessons learned in creating the flagship XS Monos certainly are at work here.
Having used nearly all of the big Pass amplifiers over the last decade, there’s a sweetness here that doesn’t even exist in the mighty (nearly 100k/pair) XS Monos. As mentioned earlier – each Pass amplifier has its own sonic signature.
These are absolutely lovely and, at this price, a tremendous value as well. If you’d like to read an in-depth review, these amplifiers are featured in our current issue.
Mark Schifter and Vera-Fi have been on a roll lately, introducing some great products offering high performance at reasonable prices. This is a great way for everyone to get into the game. If there’s anything you don’t want to skimp on, it’s power cords and power conditioners. Cheap power conditioners don’t have enough current bandwidth to prevent compression of the audio signal or, even worse, altering tonality.
Main Stream’s passive nature prevents this from happening to your system. Its underlying tech, which we will explore in the full review, makes it easy to install and doesn’t require buying another power cord to make it work. Not much bigger than a standard prescription bottle, its triangle shape is machined from billet aluminum and plugs right into the wall.
My reference system uses two separate 15A and three separate 20A circuits. Initial listening begins with the 15A circuit powering the Pass XS preamplifier, Pass XP-27 phono stage, and dCS Lina DAC/clock/headphone amplifier. The extended review will explore plugging into systems large and small, and perhaps we can even talk Vera-Fi out of a couple more of these.
The $299 question is always (for me, anyway): Does said component or accessory reveal more music proportional to the price asked? Certainly, in my main system, using the highly revealing Clarisys Audio Auditorium Plus speakers, the answer is yes immediately.
Starting with relatively average-sounding digital tracks makes it easiest to hear the Main Stream effect instantly. Streaming Robert Plant’s Sixes and Sevens is full of drum machine antics that are now made more palpable with the Main Stream present. Running through a varied playlist, from solitary female vocals to piano and other acoustic instruments, all deliver the same results. The Main Stream is more than worth the price asked, and the results are consistent across music genres.
The clarity of the overall presentation the Main Stream delivers feels more profound after 24 hours, and whether that is due to break-in or familiarity requires more investigation; however, removing it from the wall after 24 hours makes a significant difference with less resolution and smoothness (from having it out of the system) now easy to discern.
The speakers and amplification for your hi-fi system usually deliver the largest gains for cash spent, with cables and accessories a bit less. It’s still important to look at everything else you change as less dramatic but no less significant. Just like fine-tuning your speakers for optimum placement and turntable setup if you are an analog enthusiast, the Main Stream will make a similar contribution to your system.
We’ll have a wider-ranging analysis soon, but this one gets a solid “buy” from me. I’ve spent more on turntable mats, clamps, and even fuses that delivered far less (if any) real improvement. This is a solid upgrade and, even at this point, worthy of one of our Exceptional Value Awards.
The Audiophile Apartment: Jerold O’Brien’s final review, a new power strip from ISOTEK!
Journeyman Audiophile: Back next issue
Headphone Arts: The Spectacular Top Phones from Meze!
Mine: It Should Be Yours
Future Tense: Gear in our immediate future
Reviews
Killer Analog from Luxman: The PD-191A You can’t resist the Borg Episode 2 from FinkTeam MonAcoustics stunning Platimon Monitors Great power cords for entry level gear from Wireworld
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